Digest Authentication - Matrix Telecom SARVAM UMG System Manual

Digest Authentication

Digest Authentication is a challenge-based authentication service of SIP to authenticate the identity of the
originator of SIP request in the INVITE message. The recipient of the request can ascertain whether or not the
originator of the request is authorised to make the request. When the digest credentials of the originator — User
Name and Password — in the INVITE message are authenticated and accepted by the recipient, the originator and
the recipient are connected.
SARVAM UMG supports Digest Authentication. The Digest Authentication feature works on the basis of the Digest
Authentication Table in which the credentials — User Name and Password — of trusted/ authorised calling party
SIP devices are stored. You must enable the Digest Authentication on the SIP Trunk and configure the Digest
Authentication table.
SARVAM UMG will check the Digest Authentication table,
• when you enable this feature on a SIP Trunk.
• when SIP Trunk mode is Peer to Peer and Allowed IP Address for Incoming SIP Message is set to Any.
For all incoming calls (SIP requests),
• SARVAM UMG will challenge the identity of the calling party, that is, the SIP device initiating the request to
send its digest credentials.
• When the calling party sends its credentials, SARVAM UMG authenticates the credentials by matching it
with its Digest Authentication Table.
• If a match is found, the calling party will be authenticated and the call will be allowed on the SIP Trunk.
• If no match is found, SARVAM UMG will consider it as invalid authentication information and reject the call.
You may use Digest Authentication to:
• restrict access to SARVAM UMG to specific callers.
• prevent unwanted or malicious calls.
Configuring Digest Authentication
To use this feature, you must enable Digest Authentication on the desired SIP Trunk and configure the Digest
Authentication Table.
To configure Digest Authentication Table,
• Click the Advanced Settings link to expand.
• Click the Digest Authentication link.
537 Matrix SARVAM UMG System Manual